塔架结构塔身主杆法兰拼装节点螺栓脱落位置损伤识别的模型试验
|
摘要
本文提出了一种新的基于自由振动信息的塔架结构塔身主杆法兰拼装节点螺栓脱落损伤发生位置的识别方法,并通过一塔架结构模型的试验验证了该方法的准确性和有效性。文中,通过在塔架结构塔身主杆所有法兰拼装节点法兰盘外侧竖向布置应变传感器,以该处在塔架结构顶端初始冲击激励下自由振动的竖向应变响应作为螺栓脱落的损伤标识量,依据完好结构与有螺栓脱落损伤结构法兰节点竖向应变的差异构建损伤指标向量,并对一钢管塔架结构模型进行了损伤识别的试验。试验结果表明,此方法的损伤指标向量具有对螺栓脱落敏感,与初始激励大小无关,对损伤位置具有较强的局域性的特点,且塔架结构其它结构损伤对塔身主杆法兰节点螺栓脱落位置诊断的损伤指标向量的特征没有影响。
The paper presents a new detection method of the bolt looseness damage locations at flange joints of leg members based on the free vibration data,and an experiment of bolt looseness damage locations detection at flange joints is conducted to show its accuracy and validity.In the paper,the free vibration longitudinal strain responses,which are measured by the strain sensors installed at the outside of the flange joints of tower legs under the initial impact excitation applied to the top of the tower are selected as the reasonable damaged feature.And the damage index vector can be defined based on the difference between longitudinal strain of the undamaged and damaged structures.Accordingly,an experiment of a tower structure model is carried out for verification.Experimental results show that the proposed damaged index is efficient for the bolt looseness location detection and sensitive to the damage locations,and also independent of the initial excitation.Moreover,other structural damage to the tower structure has no effect on the damage index vector of the bolt looseness location at flange joint of leg members.
The paper presents a new detection method of the bolt looseness damage locations at flange joints of leg members based on the free vibration data,and an experiment of bolt looseness damage locations detection at flange joints is conducted to show its accuracy and validity.In the paper,the free vibration longitudinal strain responses,which are measured by the strain sensors installed at the outside of the flange joints of tower legs under the initial impact excitation applied to the top of the tower are selected as the reasonable damaged feature.And the damage index vector can be defined based on the difference between longitudinal strain of the undamaged and damaged structures.Accordingly,an experiment of a tower structure model is carried out for verification.Experimental results show that the proposed damaged index is efficient for the bolt looseness location detection and sensitive to the damage locations,and also independent of the initial excitation.Moreover,other structural damage to the tower structure has no effect on the damage index vector of the bolt looseness location at flange joint of leg members.
引文
[1]Law S S,Ding Y.Substructure methods for structural condition assessment[J].Journal of Sound and Vibration,2011,330(15):3606-3619.
[2]Yin T,Lam H F,Chow H M,et al.Dynamic reduction-based structural damage detection of transmission tower utilizing ambient vibration data[J].Engineering Structures,2009,31(9):2009-2019.
[3]Lazarevic A,Kanapady R,Tamma K.Damage prediction in structural mechanics using partitioning approach[J].Proceedings of SPIE-The International Society for Optical Engineering,2003,5098:202-210.
[4]Lou W J,Lin B L.Wavelet transform based method for detecting damage location of electricity transmission towers[J].Engineering Mechanics,2006,23(6):157-168.
[5]Liu C C,Xu J,Huang J H.Damage identification for transmission towers based on neural networks[J].East China Electric Power,2009,37(2):256-260.
[6]Ding K,Dhanasekar M.Flexural behavior of bonded-bolted butt joints due to bolt looseness[J].Advances in Engineering Software[J].2007,38(8-9):598-606.
[7]Woo T K,Hwang B,Jang Y J,et al.Preventing loose bolts and reducing the number of bolts required in plate heat exchangers[J].International Journal of Precision Engineering and Manufacturing,2009,10(1):29-34.
[8]闫航瑞,曾国英,赵登峰,等.基于小波分析的螺栓联接松动故障诊断[J].机械科学与技术,2012,31(7):1110-1114.YAN Hangrui,ZENG Guoying,ZHAO Dengfeng,et al.Fault diagnosis of the attachment bolt looseness based on wavelet analysis[J].Mechanical Science and Technology for Aerospace Engineering,2012,31(7):1110-1114.(in Chinese)
[9]Nichols J M,Trickey S T,Seaver M,et al.Using ambient vibrations to detect loosening of a composite-to-metal bolted Joint in the presence of strong temperature fluctuations[J].Journal of Vibration and Acoustics,2007,129(06):710-717.
[10]Thostenson E T,Chou T W.Carbon nanotube-based health monitoring of mechanically fastened composite joints[J].Composites Science and Technology,2008,68:2557-2561.
[11]Chen M Q,Xu B,Bolted joint looseness damage detection using electromechanical impedance measurements by PZT sensors[C].Third International Conference on Smart Materials and Nanotechnology in Engineering,Shenzhen,December,2011.
[12]Weilian Qu,He Zhongshan,Qin Wenke,et al.Damage location identification for bolt looseness at flange joints of leg members in high-rise steel tubular tower structures[C].The 14th Asia Pacific Vibration Conference(APVC).December 5-8,Hong Kong,2011:248.
[13]应怀樵,刘进明,敖清波,等.火箭激振钱塘江大桥模态试验[J].实验力学,1999,14(4):528-532.YING Huaiqiao,LIU Jinming,AO Qingbo,et al.Experimental modal analysis for Qian Tang Great Bridge by using small rockets exciting[J].Journal of Experimen TAL Mechanics,1999,14(4):528-532.(in Chinese)
[14]文立华,王尚文.一定距离地下火箭激振的建筑物的动力特性试验[J].世界地震工程,1995,11(3):49-53.WEN Lighua,WANG Shangwen.Testing buliding’s dynamic properties with distant rocket exciting under ground[J].Word Earthquake Engineering,1995,11(3):49-53.(in Chinese)
[15]周新刚,宋彧.土木工程试验[M].北京:中国建筑工业出版社,2011.ZHOU Xingang,SONG Yu.Civil engineering experiment[M].Beijing:China Architecture&Building Press,2011.(in Chinese)
[16]瞿伟廉,吉柏锋.下击暴流的形成与扩散及其对输电塔的灾害作用[M].北京:科学出版社,2013.QU Weilian,JI Baifeng.Formation and diffusion of downburst and its disaster effects on transmission towers[M].Beijing:Science Press,2013.(in Chinese)
[17]Weilian Qu,Wanjun Song,Yong Xia,et al.Two-step method for instability damage detection in tower body of transmission structures[J].Advances in Structural Engineering,2013,16(1):219-232.
[2]Yin T,Lam H F,Chow H M,et al.Dynamic reduction-based structural damage detection of transmission tower utilizing ambient vibration data[J].Engineering Structures,2009,31(9):2009-2019.
[3]Lazarevic A,Kanapady R,Tamma K.Damage prediction in structural mechanics using partitioning approach[J].Proceedings of SPIE-The International Society for Optical Engineering,2003,5098:202-210.
[4]Lou W J,Lin B L.Wavelet transform based method for detecting damage location of electricity transmission towers[J].Engineering Mechanics,2006,23(6):157-168.
[5]Liu C C,Xu J,Huang J H.Damage identification for transmission towers based on neural networks[J].East China Electric Power,2009,37(2):256-260.
[6]Ding K,Dhanasekar M.Flexural behavior of bonded-bolted butt joints due to bolt looseness[J].Advances in Engineering Software[J].2007,38(8-9):598-606.
[7]Woo T K,Hwang B,Jang Y J,et al.Preventing loose bolts and reducing the number of bolts required in plate heat exchangers[J].International Journal of Precision Engineering and Manufacturing,2009,10(1):29-34.
[8]闫航瑞,曾国英,赵登峰,等.基于小波分析的螺栓联接松动故障诊断[J].机械科学与技术,2012,31(7):1110-1114.YAN Hangrui,ZENG Guoying,ZHAO Dengfeng,et al.Fault diagnosis of the attachment bolt looseness based on wavelet analysis[J].Mechanical Science and Technology for Aerospace Engineering,2012,31(7):1110-1114.(in Chinese)
[9]Nichols J M,Trickey S T,Seaver M,et al.Using ambient vibrations to detect loosening of a composite-to-metal bolted Joint in the presence of strong temperature fluctuations[J].Journal of Vibration and Acoustics,2007,129(06):710-717.
[10]Thostenson E T,Chou T W.Carbon nanotube-based health monitoring of mechanically fastened composite joints[J].Composites Science and Technology,2008,68:2557-2561.
[11]Chen M Q,Xu B,Bolted joint looseness damage detection using electromechanical impedance measurements by PZT sensors[C].Third International Conference on Smart Materials and Nanotechnology in Engineering,Shenzhen,December,2011.
[12]Weilian Qu,He Zhongshan,Qin Wenke,et al.Damage location identification for bolt looseness at flange joints of leg members in high-rise steel tubular tower structures[C].The 14th Asia Pacific Vibration Conference(APVC).December 5-8,Hong Kong,2011:248.
[13]应怀樵,刘进明,敖清波,等.火箭激振钱塘江大桥模态试验[J].实验力学,1999,14(4):528-532.YING Huaiqiao,LIU Jinming,AO Qingbo,et al.Experimental modal analysis for Qian Tang Great Bridge by using small rockets exciting[J].Journal of Experimen TAL Mechanics,1999,14(4):528-532.(in Chinese)
[14]文立华,王尚文.一定距离地下火箭激振的建筑物的动力特性试验[J].世界地震工程,1995,11(3):49-53.WEN Lighua,WANG Shangwen.Testing buliding’s dynamic properties with distant rocket exciting under ground[J].Word Earthquake Engineering,1995,11(3):49-53.(in Chinese)
[15]周新刚,宋彧.土木工程试验[M].北京:中国建筑工业出版社,2011.ZHOU Xingang,SONG Yu.Civil engineering experiment[M].Beijing:China Architecture&Building Press,2011.(in Chinese)
[16]瞿伟廉,吉柏锋.下击暴流的形成与扩散及其对输电塔的灾害作用[M].北京:科学出版社,2013.QU Weilian,JI Baifeng.Formation and diffusion of downburst and its disaster effects on transmission towers[M].Beijing:Science Press,2013.(in Chinese)
[17]Weilian Qu,Wanjun Song,Yong Xia,et al.Two-step method for instability damage detection in tower body of transmission structures[J].Advances in Structural Engineering,2013,16(1):219-232.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心